My TSX, manual transmission died on me while driving. Towed it home, tried to read codes and my reader said "no connection with ECU".
Checked fuses, all good. Checked intake manifold ground, good. Checked power to ECU, good.
Immobilizer light comes on and flashes. Tried a different key, same issue.
Also when ignition is turned on I get "Check TPMS" and "Check emission system"
Motor will turn over.
Removed ECU and inspected for corrosion. Looks clean.
Any ideas?
Bad ECU, TPMS module, immobilizer module?

Thanks,
Russ